The handsome, 5-story, cast-iron building at 21 Mercer Street between Grand and Howard Streets in SoHo is being converted to four condominium apartments.
The building was erected in 1867 and is being converted by Peter Armstrong, who also converted 73 Wooster Street.
H. Thomas O'Hara is the architect for the conversion.
The full-floor apartments have gas-burning fireplaces, cherry flooring, cast-iron columns and his and her dressing rooms with dual master bathrooms in the master suite.
Polifon Piu glass sliding doors are in the home office and ceilings range from 10 feet 8 inches to 14 feet 2 inches.
The building has key-lock elevator access and the kitchens have honed Galizia Capri stone backsplash, Sub-Zero refrigerators, Miele dishwashers, 36 inch Wolf five-burner gas cook-top range and separate built-in ovens, Sub-Zero undercounter wine storage system, recessed halogen lighting, Poliform cabinetry in natural cherry finish with graphite matte glass upper cabinets, and stainless steel counters.
Each apartment has three bathrooms with Pietra Cardosa honed flooring and countertops and the master baths have electric towel warmers.
Three of the apartments have 3,021 square feet and are initially priced at $3,875,000 and the fourth has 3,096 square feet and is priced at $4,7850,000, according to Linda Fenn of Prudential Douglas Elliman.
The building was erected in 1867 and is being converted by Peter Armstrong, who also converted 73 Wooster Street.
H. Thomas O'Hara is the architect for the conversion.
The full-floor apartments have gas-burning fireplaces, cherry flooring, cast-iron columns and his and her dressing rooms with dual master bathrooms in the master suite.
Polifon Piu glass sliding doors are in the home office and ceilings range from 10 feet 8 inches to 14 feet 2 inches.
The building has key-lock elevator access and the kitchens have honed Galizia Capri stone backsplash, Sub-Zero refrigerators, Miele dishwashers, 36 inch Wolf five-burner gas cook-top range and separate built-in ovens, Sub-Zero undercounter wine storage system, recessed halogen lighting, Poliform cabinetry in natural cherry finish with graphite matte glass upper cabinets, and stainless steel counters.
Each apartment has three bathrooms with Pietra Cardosa honed flooring and countertops and the master baths have electric towel warmers.
Three of the apartments have 3,021 square feet and are initially priced at $3,875,000 and the fourth has 3,096 square feet and is priced at $4,7850,000, according to Linda Fenn of Prudential Douglas Elliman.
Related Articles
Future New York
New York’s Classical Revival: See the new Penn Station and traditional designs reshaping the luxury residential market
Today, June 24, 2026
Great Listings
Tudor City at 100: Rich history and attractive listings from $309K at Turtle Bay city-within-a-city
Today, June 24, 2026
Future New York
Price Cuts: "Big" screenwriter's Cobble Hill townhouse trimmed by $900K; Lantern House junior penthouse drops below $10M
Today, June 24, 2026
Future New York
Landmarks praises residential conversion/restoration of NoMad's Baudouine Building, Seeks revisions to rooftop addition
Tuesday, June 23, 2026
Iconic Addresses
Paul Newman's parkside office sells 47% over ask; Pre-war condo conversions lead Manhattan sales
Tuesday, June 23, 2026
Get To Know
What is a sponsor unit? Pros, cons, and NYC apartments with no board approval required from $165K
Tuesday, June 23, 2026
Future New York
NYC contracts led by $18.5M Upper East Side mansion and a bespoke Billionaires' Row condo
Tuesday, June 23, 2026
Get To Know
How property values are assessed in NYC + Great new listings with open houses from $445K
Saturday, June 20, 2026
Architecture Critic
Carter Horsley
Since 1997, Carter B. Horsley has been the editorial director of CityRealty. He began his journalistic career at The New York Times in 1961 where he spent 26 years as a reporter specializing in real estate & architectural news. In 1987, he became the architecture critic and real estate editor of The New York Post.
6sqft delivers the latest on real estate, architecture, and design, straight from New York City.
